A document that is part of the materials information system and accompanies the product. Prepared by the manufacturer, the MSDS provides information regarding the safety and chemical properties and the long-term storage, handling, and disposal of the product. Among other factors, the MSDS describes the hazardous components of a product, how to treat leaks, spills, and fires, and how to treat improper human contact with the product. Also see: Hazardous Materials